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News
Microsoft 365 outage: DDoS, or its own change? The real risk for security teams
The Microsoft 365 outage that started on November 12 wasn't limited to Outlook; Teams, Copilot, SharePoint, Defender XDR and Purview were hit too. What happened, what may have caused it, and what SOC teams should look at this week.
November 13, 2026
·
7 min
